Question 1

Will everyones ears fit into these? I like Astro

Accepted Answer

My family stood side-by-side, ear-to-ear so we could all listen, but the headphones were too small to Fit “everyone’s ears into these”...plus my daughters ears get pretty waxy so the sound quality playing out of her ear hole would have been muffled.

Question 2

What is the difference between the 250 ohm and 32 ohm models?

Accepted Answer

The Ohm is the unit of electrical impedance. It's a measure of how difficult it is for current to flow through the conductor. A conductor with a higher impedance will require a higher voltage to push an equivalent current level through it than one with a lower impedance. A 10-volt source can drive 40 milliamps (.04 amps) through a 250 Ohm impedance, but you only need a 1.5V battery to push 47 milliamps through a 32 ohm impedance. This is why 32 Ohm headphones are recommended for portable equipment (phones, etc), where low-voltage battery sources are common.

A 600 Ohm headphone is more appropriate for studio work, where the amplifier driving them often uses +/- 15 volts (a 30 volt swing).  A 250 ohm headphone is one that attempts to bridge both worlds - low enough to be used with battery powered sources, but "stiff" enough (electrically) to take advantage of the benefits that a big voltage swing provides, such as a higher s/n ratio.

A lower impedance headphone (everything else being equal) does NOT require less power to use. In fact, it requires slightly more. But you do not want to use a 600 ohm set of headphones (in general) with a low-voltage amp such as one the one in your phone or laptop. Generally, they will not play as loudly, as they will require more current than the amplifier can provide into the higher impedance.

Question 3

Do these headphones have a removable cable?

Accepted Answer

I have the dt 990 pro 250 ohms, and no they do not have a removal cable.

Question 4

Will these completely encase the ear? I can't stand headphones that put the cushion on the ear instead of around it completely, only touching the head

Accepted Answer

As long as your head is not very large, it can wrap your ears. if you want choice 250Ω or 600Ω before you need Bought a Amp。

ASIN	B0024NK344
Age Range Description	Adult
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#1,285,829 in Electronics ( See Top 100 in Electronics ) #1,936 in Over-Ear Headphones
Box Contents	Beyerdynamic DT 990 headphones (32 ohms), screwable 6.35 millimeter adapter and leatherette carrying bag
Brand Name	beyerdynamic
Colour	Silver/Black
Compatible Devices	iPhone
Control Method	Remote
Control Type	Call Control
Country of Origin	USA
Customer Reviews	4.4 4.4 out of 5 stars (704)
Earpiece Shape	Over Ear
Enclosure Material	Plastic
Global Trade Identification Number	04010118483950
Headphone Form Factor	Over Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	Over Ear
Impedance Unit of Measure	32 Ohms
Importer Contact Information	beyerdynamic India Private Limited #1, 14th Cross, 10th Main, Malleswaram, Bangalore - 560003, Contact +91-80-23310101
Is Autographed	No
Item Type Name	Headphone
Item Weight Unit of Measure	0.2 Kilograms
Manufacturer	Beyerdynamic GmbH & Co. KG, beyerdynamic GmbH & Co. KG Postfach 1320 D-74003 Heilbronn, Germany Tel : +49 7131 617301
Manufacturer Contact Information	beyerdynamic GmbH & Co. KG Postfach 1320 D-74003 Heilbronn, Germany Tel : +49 7131 617301
Model Name	DT 990
Model Number	beyerdynamic
Network Connectivity Technology	Wired
Noise Control	None
Number of Items	1
Packer Contact Information	beyerdynamic GmbH & Co. KG Postfach 1320 D-74003 Heilbronn, Germany Tel : +49 7131 617301
Product Features	Microphone Included
Series Number	483958
Specific Uses For Product	Music
Style Name	32 Ohms
UPC	798304271454 768421126791
Unit Count	1 Count
Warranty Description	2-year
Water Resistance Level	Not Water Resistant
Wireless Technology Type	3.5 mm

beyerdynamic DT 990 Edition 32 Ohm Headphone (Black/Silver)

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